April 19 Physics and astronomy, "Cosmological Dark Energy," Emil Mottola, Los Alamos National Laboratory, 4 p.m., Jones Physical Science Center, Room 409. Refreshments at 3:45 p.m.

Paul Alivisatos

Anne Robinson

Darlene Clark Hine

Pawel Mazur

Kostas Iatrou

April 23 Biological sciences, Martha Weiss, Georgetown University Department of Biology, 4 p.m., Coker Life Sciences, Room 005.

April 24 Social work, "Teaching for Engagement," Paul Rogat Loeb, author and affiliate scholar at Seattle's Center for Ethical Leadership, 11 a.m.-1 p.m., 1731 College St., northwest corner of Barnwell and College streets. Sponsored by the I. DeQuincey Newman Institute for Peace and Justice and the USC College of Social Work.

April 24 Chemical engineering, "Molecular and Cellular Engineering of 'Difficult-to-Express' Proteins," Anne Robinson, Department of Chemical Engineering, University of Delaware, 3:30 p.m., Swearingen Engineering Center, Faculty Lounge.

April 24 African American Studies, Robert Smalls Lecture, speaker is Darlene Clark Hine, a leading historian of the African-American experience who helped found the field of black women's history and is the Board of Trustees Professor of African American Studies and History at Northwestern University. 7 p.m., Capstone Campus Room. For more information, contact Carolyn Sutton at 7-7248 or csutton@gm.sc.edu.

April 26 Geological sciences, "2-D and 3-D seismic imaging and inversion of shallow (<20 m) seismic data with application to a groundwater contamination site," Colin Zelt, Rice University, 3:30 p.m., Jones Physical Science Center, Room 006.

April 26 Physics and astronomy, "Gravity Waves and All That," Pawel Mazur, professor in physics and astronomy department at USC, 4 p.m., Jones Physical Science Center, Room 409. Refreshments at 3:45 p.m.

April 27 Chemistry and biochemistry, Ursula Jakob, University of Michigan, 4 p.m., Jones Physical Science Center, Room 006. Refreshments at 3:45 p.m.

April 30 Biological sciences, Kostas Iatrou, Institute of Biology, National Centre for Scientific Research "Demokritos," Athens, Greece, 4 p.m., Coker Life Sciences, Room 005.

May 3 Geological sciences, "Science, hazard, and policy issues for intraplate earthquakes: A view from New Madrid," Seth Stein, Northwestern University, 3:30 p.m., Jones Physical Science Center, Room 006.

May 17 Thomas Cooper Library, Lecture, Robin Price, printer and publisher from Middletown, Conn., 6 p.m., Thomas Cooper Library, Graniteville Room, free. Sponsored by Thomas Cooper Library and the Southeast Book Arts Conference.

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